EP 0106101 B1 19870715 - PROCESS FOR PREPARING HIGHLY ELASTIC COLD CURING POLYURETHANE FOAMS
Title (en)
PROCESS FOR PREPARING HIGHLY ELASTIC COLD CURING POLYURETHANE FOAMS
Publication
Application
Priority
DE 3234462 A 19820917
Abstract (en)
[origin: US4478957A] The invention relates to a process for the manufacture of highly resilient, cold-curing polyurethane foams with the distinctive feature that polysiloxane-polyoxyalkylene block copolymers with the following characteristics are used as foam stabilizers: (a) the polysiloxane block is linear or branched and contains an average of 4 to 25 silicon atoms, wherein the organic radicals linked to the silicon atoms are polyoxyalkylene or methyl radicals and up to 30% of the methyl radicals can be replaced by substituted alkyl radicals with 1 to 4 carbon atoms, and/or phenyl radicals, and mixtures thereof; (b) the polyoxyalkylene portion consists of at least two polyoxyalkylene blocks, A1 and A2, which are formed from oxyethylene and oxypropylene units, wherein block A1 is formed from 45 to 100 mole percent of oxyethylene units and 55 to 0 mole percent of oxypropylene units and block A2 is formed from 0 to 50 mole percent of oxyethylene units and 100 to 50 mole percent of oxypropylene units, the molecular weight of the polyoxyalkylene blocks A1 and A2 in each case being 150 to 1,200 and the molar ratio of blocks A1:A2 falling in the range of 20:80 to 80:20; and (c) the polysiloxane block is linked to the polyoxyalkylene blocks by SiOC or SiC bridges, 1.5 to 10 polyoxyalkylene blocks being linked to each polysiloxane block on the average. The stabilizers have improved stabilizing properties and form open-cell foams at a relatively wide processing latitude.
IPC 1-7
IPC 8 full level
C08J 9/00 (2006.01); C08L 75/04 (2006.01)
CPC (source: EP US)
C08J 9/0061 (2013.01 - EP US); C08J 2375/04 (2013.01 - EP US); C08J 2483/00 (2013.01 - EP US); Y10S 521/904 (2013.01 - EP US)
Designated contracting state (EPC)
BE DE FR GB IT NL
DOCDB simple family (publication)
DE 3234462 C1 19840105; DE 3372488 D1 19870820; EP 0106101 A2 19840425; EP 0106101 A3 19850102; EP 0106101 B1 19870715; US 4478957 A 19841023
DOCDB simple family (application)
DE 3234462 A 19820917; DE 3372488 T 19830903; EP 83108693 A 19830903; US 53257983 A 19830915